The Kennishes struggle with John’s health on Switched at Birth while Mariana and Jesus come to blows on The Fosters.

John’s heart attack leaves the family in flux during tonight’s Switched at Birth episode, “The Physical Impossibility of Death in the Mind of Someone Living.” Daphne finds herself torn between her family obligations and her newfound feelings for Jace. Bay finds herself struggling romantically as well when she meets an Army medic, who served with Ty in Afghanistan.

Meanwhile John struggles to face the reality of his health post-heart attack. Regina struggles to bring in business, so Angelo offers a helping hand.

Switched at Birth airs at 8 PM ET/PT.

Later on The Fosters, Jesus and Mariana get into a heated fight over her drunken confession in front of Lexi’s parents. In “The Fallout,” Lexi’s parents are determined to keep her away from Jesus, causing Lexi to make a drastic decision that could have serious consequences on her family as well as the fosters.

Meanwhile, Callie struggles to open up during her group therapy sessions. Will Lena’s encouragement help? Confused, Callie finds herself opening up to Brandon, who helps her relive a painful incident in her past.